<template>
  <!-- 商品分类导航 -->
  <div class="type-nav">
    <div class="container">
      <div class="nav-left" @mouseleave="isShow=false">
        <h2 class="all" @mouseenter="isShow=true">全部商品分类</h2>
        <div class="sort" v-show="comIsShow">
          <div @click.prevent="goSearch" class="all-sort-list2">
            <div v-for="c1 in categoryList" :key="c1.categoryId" class="item">
              <h3>
                <a :data-type="1" :data-id="c1.categoryId" href="">{{c1.categoryName}}</a>
              </h3>
              <div class="item-list clearfix">
                <div class="subitem">
                  <dl v-for="c2 in c1.categoryChild" :key="c2.categoryId" class="fore">
                    <dt>
                      <a :data-type="2" :data-id="c2.categoryId" href="">{{c2.categoryName}}</a>
                    </dt>
                    <dd>
                      <em v-for="c3 in c2.categoryChild" :key="c3.categoryId">
                        <a :data-type="3" :data-id="c3.categoryId" href="">{{c3.categoryName}}</a>
                      </em>
                    </dd>
                  </dl>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <nav class="nav">
        <a>服装城</a>
        <a>美妆馆</a>
        <a>尚品汇超市</a>
        <a>全球购</a>
        <a>闪购</a>
        <a>团购</a>
        <a>有趣</a>
        <a>秒杀</a>
      </nav>
    </div>
  </div>
</template>

<script>
//引入
// import { getBaseCategoryList } from '@/api/product';
//简写引入mapState,mapActions
import { mapState, mapActions } from "vuex";
export default {
  name: 'TypeNav',
  data () {
    return {
      //设置显示categoryList为假
      isShow: false,
      //本地存储已经用vuex-persistedstate解决
      //2、三元判断：如果localStorage有值转为数组赋值给数据categoryList，无值将[]赋值给categoryList
      // categoryList: localStorage.getItem("categoryList") ? JSON.parse(localStorage.getItem("categoryList")) : []
    }
  },
  methods: {
    ...mapActions("product", ["getBaseCategoryListAsync"]),
    goSearch (e) {
      if (e.target.tagName === "A") {
        const { id, type } = e.target.dataset;
        const query = this.$route.query;
        delete query["category1Id"];
        delete query["category2Id"];
        delete query["category3Id"];
        this.$router.push({
          path: "/search",
          query: {
            ...query,// category1Id
            ["category" + type + "Id"]: id,
            categoryName: e.target.innerText
          }
        });
        this.isShow = false;
      }

    }
  },
  computed: {
    ...mapState("product", ["categoryList"]),
    comIsShow () {
      // 请求地址为/的时候返回true
      if (this.$route.path === "/") return true;
      return this.isShow;
    }
  },
  //挂载完毕
  mounted () {
    // 非简写
    // this.$store.dispatch("product/getBaseCategoryListAsync");
    //简写
    this.getBaseCategoryListAsync();


    //若categoryList.length>0直接返回
    // if (this.categoryList.length > 0) return;
    // // 发送请求
    // getBaseCategoryList().then(res => {
    //   // 更新数据
    //   this.categoryList = res.data.slice(0, 15);

    //本地存储已经用vuex-persistedstate解决
    //   //1、本地数据存储，并转换浏览器能识别的JSON格式
    //   localStorage.setItem("categoryList", JSON.stringify(this.categoryList));
    // })

  }
}
</script>

<style lang="less" scoped>
.type-nav {
  border-bottom: 2px solid #e1251b;
  .container {
    width: 1200px;
    margin: 0 auto;
    display: flex;
    position: relative;

    .all {
      width: 210px;
      height: 45px;
      background-color: #e1251b;
      line-height: 45px;
      text-align: center;
      color: #fff;
      font-size: 14px;
      font-weight: bold;
    }

    .nav {
      a {
        height: 45px;
        margin: 0 22px;
        line-height: 45px;
        font-size: 16px;
        color: #333;
      }
    }

    .sort {
      position: absolute;
      left: 0;
      top: 45px;
      width: 210px;
      height: 461px;
      position: absolute;
      background: #fafafa;
      border-top: 2px solid #e1251b;
      z-index: 999;

      .all-sort-list2 {
        .item {
          h3 {
            line-height: 30px;
            font-size: 14px;
            font-weight: 400;
            overflow: hidden;
            padding: 0 20px;
            margin: 0;
            &:hover {
              background-color: #d9d9d9;
            }
          }

          .item-list {
            display: none;
            position: absolute;
            width: 734px;
            min-height: 460px;
            background: #f7f7f7;
            left: 210px;
            border: 1px solid #ddd;
            top: 0;
            z-index: 9999 !important;

            .subitem {
              float: left;
              width: 650px;
              padding: 0 4px 0 8px;

              dl {
                border-top: 1px solid #eee;
                padding: 6px 0;
                overflow: hidden;
                zoom: 1;

                &.fore {
                  border-top: 0;
                }

                dt {
                  float: left;
                  width: 74px;
                  line-height: 22px;
                  text-align: right;
                  padding: 3px 6px 0 0;
                  font-weight: 700;
                }

                dd {
                  float: left;
                  width: 570px;
                  padding: 2px 0 0;
                  overflow: hidden;

                  em {
                    float: left;
                    height: 14px;
                    line-height: 14px;
                    padding: 0 8px;
                    margin-top: 5px;
                    border-left: 1px solid #ccc;
                  }
                }
              }
            }
          }

          &:hover {
            .item-list {
              display: block;
            }
          }
        }
      }
    }
  }
}
</style>